{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20821",
    "entityType": "User",
    "nonce": "0x4a9938394e80868d0c557e45fb592eafd54755223d19c5c28de8f327f005effa",
    "signature": "0x7aafe6a6d82e71acc4afe8b62e02b54b682fd3de3e8185c3efb9a2a8617cc4155a3f4e99fd255943c29ecafbdf5cba9706155c4ef8182f2e5ca2f8e971a010e41c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}